dlls/ddraw/clipper.c

   1 /* DirectDrawClipper implementation
   2  *
   3  * Copyright 2000 (c) Marcus Meissner
   4  * Copyright 2000 (c) TransGaming Technologies Inc.
   5  * Copyright 2006 (c) Stefan Dösinger
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include "ddraw_private.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  28
  29 static inline struct ddraw_clipper *impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
  30 {
  31     return CONTAINING_RECORD(iface, struct ddraw_clipper, IDirectDrawClipper_iface);
  32 }
  33
  34 static HRESULT WINAPI ddraw_clipper_QueryInterface(IDirectDrawClipper *iface, REFIID iid, void **object)
  35 {
  36     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  37
  38     TRACE("iface %p, iid %s, object %p.\n", iface, debugstr_guid(iid), object);
  39
  40     if (IsEqualGUID(&IID_IDirectDrawClipper, iid)
  41             || IsEqualGUID(&IID_IUnknown, iid))
  42     {
  43         IDirectDrawClipper_AddRef(&clipper->IDirectDrawClipper_iface);
  44         *object = &clipper->IDirectDrawClipper_iface;
  45         return S_OK;
  46     }
  47
  48     WARN("%s not implemented, returning E_NOINTERFACE.\n", debugstr_guid(iid));
  49     *object = NULL;
  50
  51     return E_NOINTERFACE;
  52 }
  53
  54 static ULONG WINAPI ddraw_clipper_AddRef(IDirectDrawClipper *iface)
  55 {
  56     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  57     ULONG refcount = InterlockedIncrement(&clipper->ref);
  58
  59     TRACE("%p increasing refcount to %u.\n", clipper, refcount);
  60
  61     return refcount;
  62 }
  63
  64 static ULONG WINAPI ddraw_clipper_Release(IDirectDrawClipper *iface)
  65 {
  66     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  67     ULONG refcount = InterlockedDecrement(&clipper->ref);
  68
  69     TRACE("%p decreasing refcount to %u.\n", clipper, refcount);
  70
  71     if (!refcount)
  72     {
  73         if (clipper->region)
  74             DeleteObject(clipper->region);
  75         HeapFree(GetProcessHeap(), 0, clipper);
  76     }
  77
  78     return refcount;
  79 }
  80
  81 static HRESULT WINAPI ddraw_clipper_SetHWnd(IDirectDrawClipper *iface, DWORD flags, HWND window)
  82 {
  83     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
  84
  85     TRACE("iface %p, flags %#x, window %p.\n", iface, flags, window);
  86
  87     if (flags)
  88     {
  89         FIXME("flags %#x, not supported.\n", flags);
  90         return DDERR_INVALIDPARAMS;
  91     }
  92
  93     wined3d_mutex_lock();
  94     clipper->window = window;
  95     wined3d_mutex_unlock();
  96
  97     return DD_OK;
  98 }
  99
 100 static HRGN get_window_region(HWND window)
 101 {
 102     POINT origin = {0, 0};
 103     RECT client_rect;
 104
 105     if (!GetClientRect(window, &client_rect))
 106     {
 107         /* This can happen if the window is destroyed, for example. */
 108         WARN("Failed to get client rect.\n");
 109         return NULL;
 110     }
 111
 112     if (!ClientToScreen(window, &origin))
 113     {
 114         ERR("Failed to translate origin.\n");
 115         return NULL;
 116     }
 117
 118     if (!OffsetRect(&client_rect, origin.x, origin.y))
 119     {
 120         ERR("Failed to translate client rect.\n");
 121         return NULL;
 122     }
 123
 124     return CreateRectRgnIndirect(&client_rect);
 125 }
 126
 127 /*****************************************************************************
 128  * IDirectDrawClipper::GetClipList
 129  *
 130  * Retrieve a copy of the clip list
 131  *
 132  * Arguments:
 133  *  rect: Rectangle to be used to clip the clip list or NULL for the
 134  *      entire clip list.
 135  *  clip_list: structure for the resulting copy of the clip list.
 136  *      If NULL, fills Size up to the number of bytes necessary to hold
 137  *      the entire clip.
 138  *  clip_list_size: Size of resulting clip list; size of the buffer at clip_list
 139  *      or, if clip_list is NULL, receives the required size of the buffer
 140  *      in bytes.
 141  *
 142  * RETURNS
 143  *  Either DD_OK or DDERR_*
 144  ************************************************************************/
 145 static HRESULT WINAPI ddraw_clipper_GetClipList(IDirectDrawClipper *iface, RECT *rect,
 146         RGNDATA *clip_list, DWORD *clip_list_size)
 147 {
 148     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 149     HRGN region;
 150
 151     TRACE("iface %p, rect %s, clip_list %p, clip_list_size %p.\n",
 152             iface, wine_dbgstr_rect(rect), clip_list, clip_list_size);
 153
 154     wined3d_mutex_lock();
 155
 156     if (clipper->window)
 157     {
 158         if (!(region = get_window_region(clipper->window)))
 159         {
 160             wined3d_mutex_unlock();
 161             WARN("Failed to get window region.\n");
 162             return E_FAIL;
 163         }
 164     }
 165     else
 166     {
 167         if (!(region = clipper->region))
 168         {
 169             wined3d_mutex_unlock();
 170             WARN("No clip list set.\n");
 171             return DDERR_NOCLIPLIST;
 172         }
 173     }
 174
 175     if (rect)
 176     {
 177         HRGN clip_region;
 178
 179         if (!(clip_region = CreateRectRgnIndirect(rect)))
 180         {
 181             wined3d_mutex_unlock();
 182             ERR("Failed to create region.\n");
 183             if (clipper->window)
 184                 DeleteObject(region);
 185             return E_FAIL;
 186         }
 187
 188         if (CombineRgn(clip_region, region, clip_region, RGN_AND) == ERROR)
 189         {
 190             wined3d_mutex_unlock();
 191             ERR("Failed to combine regions.\n");
 192             DeleteObject(clip_region);
 193             if (clipper->window)
 194                 DeleteObject(region);
 195             return E_FAIL;
 196         }
 197
 198         if (clipper->window)
 199             DeleteObject(region);
 200         region = clip_region;
 201     }
 202
 203     *clip_list_size = GetRegionData(region, *clip_list_size, clip_list);
 204     if (rect || clipper->window)
 205         DeleteObject(region);
 206
 207     wined3d_mutex_unlock();
 208     return DD_OK;
 209 }
 210
 211 /*****************************************************************************
 212  * IDirectDrawClipper::SetClipList
 213  *
 214  * Sets or deletes (if region is NULL) the clip list
 215  *
 216  * This implementation is a stub and returns DD_OK always to make the app
 217  * happy.
 218  *
 219  * PARAMS
 220  *  region  Pointer to a LRGNDATA structure or NULL
 221  *  flags   not used, must be 0
 222  * RETURNS
 223  *  Either DD_OK or DDERR_*
 224  *****************************************************************************/
 225 static HRESULT WINAPI ddraw_clipper_SetClipList(IDirectDrawClipper *iface, RGNDATA *region, DWORD flags)
 226 {
 227     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 228
 229     TRACE("iface %p, region %p, flags %#x.\n", iface, region, flags);
 230
 231     wined3d_mutex_lock();
 232
 233     if (clipper->window)
 234     {
 235         wined3d_mutex_unlock();
 236         return DDERR_CLIPPERISUSINGHWND;
 237     }
 238
 239     if (clipper->region)
 240         DeleteObject(clipper->region);
 241     if (!region)
 242         clipper->region = NULL;
 243     else if (!(clipper->region = ExtCreateRegion(NULL, 0, region)))
 244     {
 245         wined3d_mutex_unlock();
 246         ERR("Failed to create region.\n");
 247         return E_FAIL;
 248     }
 249
 250     wined3d_mutex_unlock();
 251
 252     return DD_OK;
 253 }
 254
 255 static HRESULT WINAPI ddraw_clipper_GetHWnd(IDirectDrawClipper *iface, HWND *window)
 256 {
 257     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 258
 259     TRACE("iface %p, window %p.\n", iface, window);
 260
 261     wined3d_mutex_lock();
 262     *window = clipper->window;
 263     wined3d_mutex_unlock();
 264
 265     return DD_OK;
 266 }
 267
 268 static HRESULT WINAPI ddraw_clipper_Initialize(IDirectDrawClipper *iface,
 269         IDirectDraw *ddraw, DWORD flags)
 270 {
 271     struct ddraw_clipper *clipper = impl_from_IDirectDrawClipper(iface);
 272
 273     TRACE("iface %p, ddraw %p, flags %#x.\n", iface, ddraw, flags);
 274
 275     wined3d_mutex_lock();
 276     if (clipper->initialized)
 277     {
 278         wined3d_mutex_unlock();
 279         return DDERR_ALREADYINITIALIZED;
 280     }
 281
 282     clipper->initialized = TRUE;
 283     wined3d_mutex_unlock();
 284
 285     return DD_OK;
 286 }
 287
 288 static HRESULT WINAPI ddraw_clipper_IsClipListChanged(IDirectDrawClipper *iface, BOOL *changed)
 289 {
 290     FIXME("iface %p, changed %p stub!\n", iface, changed);
 291
 292     /* XXX What is safest? */
 293     *changed = FALSE;
 294
 295     return DD_OK;
 296 }
 297
 298 static const struct IDirectDrawClipperVtbl ddraw_clipper_vtbl =
 299 {
 300     ddraw_clipper_QueryInterface,
 301     ddraw_clipper_AddRef,
 302     ddraw_clipper_Release,
 303     ddraw_clipper_GetClipList,
 304     ddraw_clipper_GetHWnd,
 305     ddraw_clipper_Initialize,
 306     ddraw_clipper_IsClipListChanged,
 307     ddraw_clipper_SetClipList,
 308     ddraw_clipper_SetHWnd,
 309 };
 310
 311 HRESULT ddraw_clipper_init(struct ddraw_clipper *clipper)
 312 {
 313     clipper->IDirectDrawClipper_iface.lpVtbl = &ddraw_clipper_vtbl;
 314     clipper->ref = 1;
 315
 316     return DD_OK;
 317 }
 318
 319 struct ddraw_clipper *unsafe_impl_from_IDirectDrawClipper(IDirectDrawClipper *iface)
 320 {
 321     if (!iface)
 322         return NULL;
 323     assert(iface->lpVtbl == &ddraw_clipper_vtbl);
 324
 325     return impl_from_IDirectDrawClipper(iface);
 326 }